Titin Short Sleeve Cover Shirt Outer Compression Shirt Training Running Outer compression shirt, which is designed to securely hold the hydro-gel inserts against your body during the most extreme workouts. This compression shirt provides the balance needed for a true HyperGravity training experience. Double-reinforced stitching ensures a quality fit. Smart Sorbtek material blocks sweat and grass stains while moving moisture away from the body four times faster than other fabrics. This item DOES NOT include the gel weights.